Automobile doorlock



July 7, 1931.

R. N. SMITH AUTOMOBILE 'DOORLOCK Filed Feb. 17, 1950 AYVI/ I/I Patented Jul 7, 1931 STATES 'RQBERTN. SMITH, or KANSAS err-v; MISSOURI, ASSIG-NOR or ONE-HALF TO JAMES L. i

- 110cm, or KANSAS GITY, KA1\TSAS AUTOMOBILE some '7 1 7 Application filed February 17,1930." Serial ng maeso My invention relates to; improvements in automobile door locks.

One of the objects of my inventionis to provide a door lock whichhas "novel means for forcing a closed car door open when the look handle is turned to release the bolt from the jamb, thus enablinga tight fitting door to be easily opened from theinside of the car. 7

A further object o-fthe invention is to provide a novel lock which is simple, cheap,

strong, durable, not likely to get out of order, 7

which is readily adaptable tocar door locks of common type, and which enables the lock handle to be swung from abolt retractedposn tion to a bolt locking position, in the type of locks in which the handle is employed. to

v Fig. 1 isanelevation, partly lock handle being. shown'in solid lines in the unlocked position, and in dotted lines in the bolt retracted position.

Fig. 2 is a section on d 1, the lock being shown in planlooking at its upper end, and the bolt being engaged with the jamb and the door closed and push mem; ber retracted.

Fig. 3' is a view similar to Fig. 2, thebolt being retracted, and the push member having engaged the,- jamb and forcedthe door partly open.

Fi 4 is anenlarged section on the line 44 of Fig. 1,

Fig. 5 is a sectionon the line 5-5 of Fig.4. I Similar reference characters designate s1m-' ilar parts in the different views.

1 designatesalock casing of usual type .mounted on a car door 2, andhaving the usual bolt 3 r etractible by-an oscillative handle lfrom a recess 5 in a door jamb 6, having a usual vertical seat 7 at the inner side of the door, when the latter is closed.

a t I J the line 2-2 of Fig T [F01 forcing .the. door 2, when closed, toward the open position; when the I handle. 4 swung to retractthe bolt 3, I provide'apush 'member, which, has threaded engagement with the casing 1, and which compris'es'a ihorizontalscre'w 8, which extends through -andjis rotative and axially slidabl'e in-"the easing land is adapted to have-itsiinner end strike against the ja nbseat'l. "The casing T '1 is providedon its inner sidewitha fixed plate 9 having a circularfrow' of 'recesses"l0 1 in which are fitted the threads of thescrew 8, 5 r

fi lienfthe screw 8 is turned counter? clockwise, asviewed in Figs. 1'fand5, it willre- "tract into the casing, to the'position shown in Fig. 2. When turnedc1ockwise, as viewed thefllock casing l and 'willstrikeithe seatt7, thus 'forcingthe' door 2-toward the open posi- 'tion,' thus' assisting e. operator in the fear pe the door. :1.

For tu'rnin'glthe push'member or screw 8to I "the position shown in Fig.3,when'thehand1e .4 isswung. to retract the bolt 3; f'rom the, recess i5,thescrew8 is provided with" a lost motion co'nnectingfmeans with the handle 4, comprising, as shown, the following described The; screw 8 slot 14in a crank15, which isfmou'nted'j on and oscillative with a horizontal-shaft 16 I 1 The screwl has on'it'ia nut 17 which holds the link 12 onthe screw;

fAspring 18; encirclin'g the push screw '8 bearsjagainst the casing 1 and 'against the 'cr'ank arm 11 of the screw-8, and exertsi a' tension tending to normally retract the crank arm. 11 andf's'crew 8 to the inner position,

shown in Fig. 2, and in'solid lines in Fig.1

In this position of} the parts, the handle 4:,

crankloand link 12 will be in the positions "shown in Fig.2, a'nd in solid 'lines in Fig. 1,

with the-co t g screw laatthe left end of the slot 14, as viewed in Fig; 1 fWhen it'is d esired to open'the door, the handle 4 is swung"tojtheposition-{shownin 190. I

0 k-lgl to whichisfpivotedaylink"12awhichis I -mounted on-af screw 13' slidably' mounted in 'a dotted lines in Fig. 1, thereby moving the crank 15, link 12 and crank arm 11 to the positions shown in dotted lines in Fig. 1, which swinging of the crank arm 11 will turn the push screw 8 clock-wise, as viewed in Fig. 1, thereby causing the push screw 8 to move out of the casing 1 and against the jamb seat 7, as in Fig. 3, thus pushing the door 2 to the partly open position shown in Fig. 3. The door can then be easily pushed open from the inside of the car.

Sufficient loss motion is provided to permit the bolt 3 to be withdrawn from the recess 5 before the push screw 8 pushes the door toward the open position.

When the handle 4 is released, it will be retracted to its initial position, shown in solid lines in Fig. 1, as will be the crank 15, by a spring in the casing, not shown, but which is usually provided for this purpose.

Upon the retraction of the crank 15, the spring 18 will retract the crank arm 11 and push screw 8 to the position shown in Fig. 2 and in solid lines in Fig. 1.

When it is desired to lock the door, the handle 4: isswung to the left, from the position shown in solid lines in Fig. 1 thus swing-- ing the crank 15 to the left from the position .in which itis shown in solid lines in Fig. 1.

Such movement to the left of the handle a and .crank 15 will actuatemechanism, not shown, to lock the door.

The provision of the slot 14 in the crank 15 and the screw 13 slidably mounted in said slot, enables such locking movement of the handle 4 and crank 15 without affecting the position of the link 12 or crank arm 11. This lost motion connection of the crank 15 with the link 12, however, does not interfere with the actuation of the'push screw 8 to push the door toward the open position, when the handle 4 is swung from the locked position to the position shown in dotted lines in Fig. 1.

I do not limit my invention to the structure shown and described, as manyv modifications, within the scope of the appended claim, may be a made without departing from the spirit of my invention.

What I claim is 2-- In a car door lock, the combination with a lock casing, a bolt in said casing, and a handle for retracting said bolt movable from a bolt retracted position to a bolt locking position, of a push member rotative and axially slidable in and having threaded engagement with said casing such that, when turned in one direction, it will be adapted to push against a jamb so as to open a closed door associated with said jamb and carrying said casing, said push member having a crank arm, a crank on and oscillative with said handle and having a slot, a link pivoted to said crank arm, means slidable in said slot connecting said crank with said crank arm for turning said push member in said direction In testimony whereof I have signed my name to this specification.

ROBERT N. SMITH. 

